8417 tubes and their history. - Michael Samra - Tubes Asylum

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8417 tubes and their history.

Michael Samra

I was never that fond of the 8417 because my Dynaco MK6s were not so good but to be fair,they had the stock 7199 driver tubes so that was a lot of it.
I bought the amps new in kit form on sale for 269 each from a place called Dixie hifi. This was in 1980.They were good sized amps but they weren't big on detail so I ended up selling them after 4 years for 950 for the pair.
This kind of turned me off to 8417s and until a friend brought this Dynaco ST70 last year with the curcio copy driver board and it had four 6922s,two per channel.. The 8417s were hooked in triode and I can tell you that ST70 was one of the most dynamic and powerful ST70s I've ever heard..This amp was more full and dynamic than any ST70 I've heard running UL..The only thing it would be was the 8417s so from then on,that is a wonderful tube in the right setup.
Like Steve O said,it was one of the very last power tubes to come on the market and companies were starting to switch over to solid state so very few amps used them other than Bogen and other PA amps and Fisher and Dynaco and Quicksilver. Those are the ones that come to mind..I'm sure there are others.There were also some guitar amps and some were used in industrial applications.
This is no doubt the reason New Sensor,Shuggie,or SED, didn't bother reproducing the tube..There isn't enough equipment to justify a production run` I would guess.

"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken

Edits: 08/10/16

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Topic - 8417 tubes and their history. - Michael Samra 21:30:03 08/09/16 (10)

RE: 8417 tubes and their history. - Alpha Al 19:54:06 08/11/16 (0)

RE: 8417 tubes and their history. - hahax@verizon.net 18:45:40 08/10/16 (0)

RE: 8417 tubes and their history. - Jim McShane 07:40:14 08/10/16 (2)

It kind of puts you in mind of the later EI KT90 type 3 and later tubes - Michael Samra 20:25:51 08/10/16 (0)

RE: 8417 tubes and their history. - caffeinator 12:52:28 08/10/16 (0)

RE: 8417 tubes and their history. - garymuffley 07:05:33 08/10/16 (0)

IMO&E the 8417 amps Quaicksilver made with two GZ34s and an LCLCLC PSU were - Timbo in Oz 02:28:07 08/10/16 (3)

RE: IMO&E the 8417 amps Quaicksilver made with two GZ34s and an LCLCLC PSU were - garymuffley 08:49:25 08/10/16 (1)

It was a long time ago! :-) - Timbo in Oz 09:51:11 08/10/16 (0)

Yep, agree. Heard 'em with Vandy's at Audio Connection in Jersey. Natural timbre, clear & robust sound. nt - Rick W 07:33:38 08/10/16 (0)

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